Diehl, R., Halloin, H., Kretschmer, K., Strong, A. W., Wang, W., Jean, P., Lichti, G. G., Knödlseder, J., Roques, J.-P., Schanne, S., Schönfelder, V., Kienlin, A. v., Weidenspointner, G., Winkler, C., & Wunderer, C. (2006). 26Al in the inner galaxy: large-scale spectral characteristics derived with SPI/INTEGRAL. Astronomy & Astrophysics, 449(3), 1025-1031. doi:10.1051/0004-6361:20054301.